Sandpapering-machine



(No Model.) 3 Sheets-Sheet 1.

J. B. LOWRY 8v J. OLDENDORPH. YSMDPAPBRING MACHINE.

No. 592,992. Patented Nov, 2, 1897.

MWI/111171;

-f Jaim daan y f ff 6.65

(No Model.) 3 Sheets-Sheet 2.

J. B. LUWRY 8v J. OLDENDORPH.l

sANDlAPBRING MAGHINB.

No. 592,992. Patented Nov. 2,1897.4 .ZlqI/ A lie-S.;

(No Model.) 3 Sheets-Sheet 3.

J. B. LOWRY & J. GLDBNDORPH. SMDPAPBRING MACHINE.

No. 592,992. Patented Nov. 2, 1897.

UNITED STATES kParent raten.

JOHN B. LOXVRY AND JOHN OLDENDORPH, OF ST. LOUIS, MISSOURI.

SANDPAPRING-IVIACHINE.

SPECIFICATION forming part of Letters Patent No. 592,992, dated November 2, 1897.

Application filed February 2, 1897. Serial No. 621,720. (No model.)

o all whom t may concern.:

Be it known that We, JOHN B. LOWRY and Jol-1N OLDENDORPH, citizens of the United States, residing at the city of St. Louis, in the State of Missouri, have invented a certain new and useful Improvement in Sandpapering-Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

The object of our invention is to provide a machine particularly adapted to sandpaper moldings Without Wearing the angle edges thereof by means of a rubber belt covered with sand and shaped to the form of the molding, as will be particularly described and claimed.

Referring to the drawings forming a part of this specification, Figure I illustrates a front elevation of our device. Fig. II is a detail sectional view of a movable idler,talren along the line II II of Fig. I. Fig. III is a detail sectional.vieur of the pressure-roller, taken along the line III III of Fig. I. Fig. lV is a top plan View of the table along which the molding to be sandpapered is fed. Fig. Vis a side elevation of the view shown in Fig. I. Fig. VI is a horizontal section taken along the line VI VI of Fig. I, the belt 7 being removed. Fig. VII is a front elevation of a modified form ofV construction in which a segmental oscillating baud is used instead of a continuous belt, as shown in our preferred construction. Fig. VIII is a detail view showing a transverse section of the table. Fig. IX is a front view thereof. Fig. X is a side elevation of a modified form of feedroller. Fig. XI is a detail showing a transverse section of the belt. Fig. XII is a front elevation of another modified form of construction in which a circular oscillating band is used.

1 is a frame, on the upper part of which is journaled the shaft of the large guide-wheel 2. 3 is the said shaft on which the Wheel 2 is secured and driven by any suitable power by means of a belt on the drive-wheel 4, attached to the other end thereof.

5 is a support on which the shaft 3 is also journaled.

G is a table supporting the entire device.

7 is a continuous belt constructed as llereinafter described, which passes around the main wheel 2, pressure-roller 8, and idlers 9 and 10.

11 and l2 are feed-rollers to feed the molding 13 under the belt 7 and roller S.

1a is a tilting table supplied with rollers 15, over which the said molding 13 is fed.

16 is a lever hung below the table 6 and pivoted thereto, bearing a pin 17, which rides in a slot in the movable plate 1S for the purpose of raising or lowering the table 111 to or from the belt 7. This end is further facilitated by means of elongated eyes in supports 19, to which the table is hinged to permit its being tilted, as shown at o.. his allows moldings of various thicknesses to be sandpapered.

The molding is fed on the table la under the feed-rollers 11 and 12 by means of the roller ll being revolved by a Wheel 20, attached to its shaft 21. This Wheel 2O is propelled by a drive-belt 22, which in turn receives its motion from the main shaft 3 through the medium of belt 23, Wheel 24, shaft 25, and pulley 26. It will be observed that the dotted lines show the different Ways in which the belt 22 may be hung so as to accomplish the revolving of the feed-roll 11 in either direction.

27 is a sprocket-chain used to impart isochronous motion to the feed-roller 12. These feed-rollers may be further adj usted by means of the set-screws 2S and 29.

One of the idlers l() is hung on an arm 30, which is pivoted to the fra-ine 1 at 31. Attached to said arm 30 is a cord 32, which passes over a pulley 33 and which has suspended from its end a Weight 34. It will be readily seen that the pull of this Weight Will keep the idler 10 always tight against the belt 7.

The Wheel 8 is hung on a plate 35, riding between cheeks 36.

37 is a lever-arm f ulcruined to the frame 1 at 38 and supplied With aiveight 39 at its outer end. It is pivotally connected with the plate 35 at 40 and serves to keep the pressureroller 8 heavily pressed against the molding 13. I

The belt 7 is constructed of ordinary canvas or leather belting adapted to ride over the various wheels and idlers, as described. To this is attached a rubber form correspond- IOO ing in shape to the irregular surface of the molding to be sandpapered. The feed-rollers 11 and 12 are also of form corresponding to the molding. It is necessary that belt and feed-rollers be changedfor each pattern of molding.

The surface of the rubber belt, molded to l t the surface to be sandpapered, is covered with glue and then sprinkled with sand, so.

that the entire belt is one contin nous rubbingsurface.

The device is operated by first supplying` it with feed-rollers and a belt of form corresponding to the molding to be sandpapered.

Sim ultaj neously the feed-rollers are revolved by the means already described. thus fed under the belt, said belt moving rapidly and its sanded surface quickly smooths the rough molding. The idler 10 is drawn tightlyagainst the belt by means of the weight 34, and pressure is maintained against the molding by means of the weight 39.

Our invention smooths all rough surfaces,

The molding is leaves the edges clean and sharp, and accomplishes the results in a minimum of time.

Moreover, the wavy surface moldings have` when they first come from the mill and which shows so plainly when polished has c0m. pletely disappeared when sandpapered in our l machine.

Fig. VII shows a modification of our device. Inthis construction we use a strip of rubber 41, attached to a vibrating segment 42, the;

backward and forward motion of which is ac- '1 It, is also complished by an eccentric 43.

practicable to use a rubber belt, as described,f but placed around one wheel 2 only, as shown in Fig. XII, which revolves close up to the surface to be sandpapered.

While we have described the feed-roller l1 'as receiving Aits motion through power imparted from the shaft 3 by means of the intervention of the belt 23, wheel 24, shaft 25, and Abelt 22, we do not limit ourselves to this means, as such motion may be derived from power yapplied directly to the shaft 21.

We have described the feed-rollers 11 and 12 as being shaped to correspond with the form of the molding to be sandpapered; but we do not limit ourselves to such a construction, as these feed-rollers may be perfectly flat, as shown in Fig. X, like-the idlers 9 and l0. By using fiat feed-rollers it is not necessary to change them every time a new molding is to be sandpapered, and it is possible to get the proper purchase on the molding with such feed-rollers by means of the adjustable table 14, said table enabling us to rest the molding into close contact with the said feed-rollers.

-We claim as our invention- 1. In a sandpapering-machine, the combination of a suitable frame, a tilting and adjustable table for the article to be sandpapered carried by said frame, and a sandpapering means also carried by said frame and yieldingly held against the article on the table, substantially as shown and described.

2. 'In a sandpapering-machine, the combination of a suitable frame, a tilting and adj ustable table on which the articles to be sandpapered are supported carried by said frame, a belt passing over pulleys and idlers journaled in said frame and having one of its faces conforming to the surface of the article to be sandpapered, suitable means carried by the frame for yieldingly holding the belt on the article, and suitable means for' feeding the article under the belt, substantially as shown and described.

3. In a sandpapering-machine, the combination' of a suitable frame, a tilting and ad- 1' justable table carried by said frame, a main guide wheel or pulley and an idler journaled in said frame, a second idler carried on an arm pivoted to said frame, a vertically-sliding pressure-roller also carried by said frame, and a belt passing around said guide wheel or pulley, idlers and pressure-roller and provided on one of its faces with a sand coverfing, substantially as shown and described.

JOHN B. LOVVRY. 'JOHN OLDENDORPH.

In presence of- STANLEY STONER, E. S. KNIGHT. 

